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aba5acdf SH |
1 | /* |
2 | * q_gred.c GRED. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
ae665a52 SH |
9 | * Authors: J Hadi Salim(hadi@nortelnetworks.com) |
10 | * code ruthlessly ripped from | |
11 | * Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
aba5acdf SH |
12 | * |
13 | */ | |
14 | ||
15 | #include <stdio.h> | |
16 | #include <stdlib.h> | |
17 | #include <unistd.h> | |
18 | #include <syslog.h> | |
19 | #include <fcntl.h> | |
20 | #include <sys/socket.h> | |
21 | #include <netinet/in.h> | |
22 | #include <arpa/inet.h> | |
23 | #include <string.h> | |
24 | ||
25 | #include "utils.h" | |
26 | #include "tc_util.h" | |
27 | ||
28 | #include "tc_red.h" | |
29 | ||
30 | ||
31 | #if 0 | |
32 | #define DPRINTF(format,args...) fprintf(stderr,format,##args) | |
33 | #else | |
34 | #define DPRINTF(format,args...) | |
35 | #endif | |
36 | ||
37 | static void explain(void) | |
38 | { | |
39 | fprintf(stderr, "Usage: ... gred DP drop-probability limit BYTES " | |
40 | "min BYTES max BYTES\n"); | |
41 | fprintf(stderr, " avpkt BYTES burst PACKETS probability PROBABILITY " | |
42 | "bandwidth KBPS\n"); | |
43 | fprintf(stderr, " [prio value]\n"); | |
44 | fprintf(stderr," OR ...\n"); | |
45 | fprintf(stderr," gred setup DPs <num of DPs> default <default DP> " | |
46 | "[grio]\n"); | |
47 | } | |
48 | ||
49 | #define usage() return(-1) | |
50 | ||
ebde8780 SH |
51 | static int init_gred(struct qdisc_util *qu, int argc, char **argv, |
52 | struct nlmsghdr *n) | |
aba5acdf SH |
53 | { |
54 | ||
55 | struct rtattr *tail; | |
56 | struct tc_gred_sopt opt; | |
ebde8780 SH |
57 | int dps = 0; |
58 | int def_dp = -1; | |
aba5acdf SH |
59 | |
60 | while (argc > 0) { | |
61 | DPRINTF(stderr,"init_gred: invoked with %s\n",*argv); | |
62 | if (strcmp(*argv, "DPs") == 0) { | |
63 | NEXT_ARG(); | |
64 | DPRINTF(stderr,"init_gred: next_arg with %s\n",*argv); | |
ebde8780 SH |
65 | dps = strtol(*argv, (char **)NULL, 10); |
66 | if (dps < 0 || dps >MAX_DPs) { | |
67 | fprintf(stderr, "DPs =%d\n", dps); | |
aba5acdf SH |
68 | fprintf(stderr, "Illegal \"DPs\"\n"); |
69 | fprintf(stderr, "GRED: only %d DPs are " | |
ebde8780 | 70 | "currently supported\n",MAX_DPs); |
aba5acdf SH |
71 | return -1; |
72 | } | |
73 | } else if (strcmp(*argv, "default") == 0) { | |
74 | NEXT_ARG(); | |
ebde8780 | 75 | def_dp = strtol(*argv, (char **)NULL, 10); |
1558971d | 76 | if (dps == 0) { |
aba5acdf | 77 | fprintf(stderr, "\"default DP\" must be " |
ebde8780 | 78 | "defined after DPs\n"); |
aba5acdf SH |
79 | return -1; |
80 | } | |
ebde8780 SH |
81 | if (def_dp < 0 || def_dp > dps) { |
82 | fprintf(stderr, | |
83 | "\"default DP\" must be less than %d\n", | |
84 | opt.DPs); | |
aba5acdf SH |
85 | return -1; |
86 | } | |
87 | } else if (strcmp(*argv, "grio") == 0) { | |
88 | opt.grio=1; | |
89 | } else if (strcmp(*argv, "help") == 0) { | |
90 | explain(); | |
91 | return -1; | |
92 | } else { | |
93 | fprintf(stderr, "What is \"%s\"?\n", *argv); | |
94 | explain(); | |
95 | return -1; | |
96 | } | |
97 | argc--; argv++; | |
ebde8780 | 98 | } |
aba5acdf | 99 | |
ebde8780 SH |
100 | if (!dps || def_dp == -1) { |
101 | fprintf(stderr, "Illegal gred setup parameters \n"); | |
102 | return -1; | |
103 | } | |
104 | ||
105 | memset(&opt, 0, sizeof(struct tc_gred_sopt)); | |
106 | opt.DPs = dps; | |
107 | opt.def_DP = def_dp; | |
108 | ||
109 | DPRINTF("TC_GRED: sending DPs=%d default=%d\n",opt.DPs,opt.def_DP); | |
aba5acdf | 110 | n->nlmsg_flags|=NLM_F_CREATE; |
228569c3 | 111 | tail = NLMSG_TAIL(n); |
aba5acdf SH |
112 | addattr_l(n, 1024, TCA_OPTIONS, NULL, 0); |
113 | addattr_l(n, 1024, TCA_GRED_DPS, &opt, sizeof(struct tc_gred_sopt)); | |
228569c3 | 114 | tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; |
ebde8780 | 115 | return 0; |
aba5acdf SH |
116 | } |
117 | /* | |
118 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | |
119 | */ | |
120 | static int gred_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n) | |
121 | { | |
122 | int ok=0; | |
123 | struct tc_gred_qopt opt; | |
124 | unsigned burst = 0; | |
125 | unsigned avpkt = 0; | |
126 | double probability = 0.02; | |
127 | unsigned rate = 0; | |
128 | int wlog; | |
129 | __u8 sbuf[256]; | |
130 | struct rtattr *tail; | |
131 | ||
132 | memset(&opt, 0, sizeof(opt)); | |
133 | ||
134 | while (argc > 0) { | |
135 | if (strcmp(*argv, "limit") == 0) { | |
136 | NEXT_ARG(); | |
137 | if (get_size(&opt.limit, *argv)) { | |
138 | fprintf(stderr, "Illegal \"limit\"\n"); | |
139 | return -1; | |
140 | } | |
141 | ok++; | |
142 | } else if (strcmp(*argv, "setup") == 0) { | |
143 | if (ok) { | |
144 | fprintf(stderr, "Illegal \"setup\"\n"); | |
145 | return -1; | |
146 | } | |
147 | return init_gred(qu,argc-1, argv+1,n); | |
ae665a52 | 148 | |
aba5acdf SH |
149 | } else if (strcmp(*argv, "min") == 0) { |
150 | NEXT_ARG(); | |
151 | if (get_size(&opt.qth_min, *argv)) { | |
152 | fprintf(stderr, "Illegal \"min\"\n"); | |
153 | return -1; | |
154 | } | |
155 | ok++; | |
156 | } else if (strcmp(*argv, "max") == 0) { | |
157 | NEXT_ARG(); | |
158 | if (get_size(&opt.qth_max, *argv)) { | |
159 | fprintf(stderr, "Illegal \"max\"\n"); | |
160 | return -1; | |
161 | } | |
162 | ok++; | |
163 | } else if (strcmp(*argv, "DP") == 0) { | |
164 | NEXT_ARG(); | |
165 | opt.DP=strtol(*argv, (char **)NULL, 10); | |
166 | DPRINTF ("\n ******* DP =%u\n",opt.DP); | |
167 | if (opt.DP >MAX_DPs) { /* need a better error check */ | |
168 | fprintf(stderr, "DP =%u \n",opt.DP); | |
169 | fprintf(stderr, "Illegal \"DP\"\n"); | |
170 | fprintf(stderr, "GRED: only %d DPs are currently supported\n",MAX_DPs); | |
171 | return -1; | |
172 | } | |
aba5acdf SH |
173 | ok++; |
174 | } else if (strcmp(*argv, "burst") == 0) { | |
175 | NEXT_ARG(); | |
176 | if (get_unsigned(&burst, *argv, 0)) { | |
177 | fprintf(stderr, "Illegal \"burst\"\n"); | |
178 | return -1; | |
179 | } | |
180 | ok++; | |
181 | } else if (strcmp(*argv, "avpkt") == 0) { | |
182 | NEXT_ARG(); | |
183 | if (get_size(&avpkt, *argv)) { | |
184 | fprintf(stderr, "Illegal \"avpkt\"\n"); | |
185 | return -1; | |
186 | } | |
187 | ok++; | |
188 | } else if (strcmp(*argv, "probability") == 0) { | |
189 | NEXT_ARG(); | |
190 | if (sscanf(*argv, "%lg", &probability) != 1) { | |
191 | fprintf(stderr, "Illegal \"probability\"\n"); | |
192 | return -1; | |
193 | } | |
194 | ok++; | |
195 | } else if (strcmp(*argv, "prio") == 0) { | |
196 | NEXT_ARG(); | |
197 | opt.prio=strtol(*argv, (char **)NULL, 10); | |
198 | /* some error check here */ | |
199 | ok++; | |
200 | } else if (strcmp(*argv, "bandwidth") == 0) { | |
201 | NEXT_ARG(); | |
202 | if (get_rate(&rate, *argv)) { | |
203 | fprintf(stderr, "Illegal \"bandwidth\"\n"); | |
204 | return -1; | |
205 | } | |
206 | ok++; | |
207 | } else if (strcmp(*argv, "help") == 0) { | |
208 | explain(); | |
209 | return -1; | |
210 | } else { | |
211 | fprintf(stderr, "What is \"%s\"?\n", *argv); | |
212 | explain(); | |
213 | return -1; | |
214 | } | |
215 | argc--; argv++; | |
216 | } | |
217 | ||
218 | if (!ok) | |
219 | return 0; | |
220 | ||
221 | if (rate == 0) | |
222 | get_rate(&rate, "10Mbit"); | |
223 | ||
224 | if (!opt.qth_min || !opt.qth_max || !burst || !opt.limit || !avpkt || | |
225 | (opt.DP<0)) { | |
226 | fprintf(stderr, "Required parameter (min, max, burst, limit, " | |
227 | "avpket, DP) is missing\n"); | |
228 | return -1; | |
229 | } | |
230 | ||
231 | if ((wlog = tc_red_eval_ewma(opt.qth_min, burst, avpkt)) < 0) { | |
232 | fprintf(stderr, "GRED: failed to calculate EWMA constant.\n"); | |
233 | return -1; | |
234 | } | |
235 | if (wlog >= 10) | |
236 | fprintf(stderr, "GRED: WARNING. Burst %d seems to be to " | |
237 | "large.\n", burst); | |
238 | opt.Wlog = wlog; | |
239 | if ((wlog = tc_red_eval_P(opt.qth_min, opt.qth_max, probability)) < 0) { | |
240 | fprintf(stderr, "GRED: failed to calculate probability.\n"); | |
241 | return -1; | |
242 | } | |
243 | opt.Plog = wlog; | |
244 | if ((wlog = tc_red_eval_idle_damping(opt.Wlog, avpkt, rate, sbuf)) < 0) | |
245 | { | |
246 | fprintf(stderr, "GRED: failed to calculate idle damping " | |
247 | "table.\n"); | |
248 | return -1; | |
249 | } | |
250 | opt.Scell_log = wlog; | |
251 | ||
228569c3 | 252 | tail = NLMSG_TAIL(n); |
aba5acdf SH |
253 | addattr_l(n, 1024, TCA_OPTIONS, NULL, 0); |
254 | addattr_l(n, 1024, TCA_GRED_PARMS, &opt, sizeof(opt)); | |
255 | addattr_l(n, 1024, TCA_GRED_STAB, sbuf, 256); | |
228569c3 | 256 | tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; |
aba5acdf SH |
257 | return 0; |
258 | } | |
259 | ||
260 | static int gred_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) | |
261 | { | |
262 | struct rtattr *tb[TCA_GRED_STAB+1]; | |
263 | struct tc_gred_qopt *qopt; | |
264 | int i; | |
265 | SPRINT_BUF(b1); | |
266 | SPRINT_BUF(b2); | |
267 | SPRINT_BUF(b3); | |
268 | SPRINT_BUF(b4); | |
269 | SPRINT_BUF(b5); | |
270 | ||
271 | if (opt == NULL) | |
272 | return 0; | |
273 | ||
3b3ecd31 | 274 | parse_rtattr_nested(tb, TCA_GRED_STAB, opt); |
aba5acdf SH |
275 | |
276 | if (tb[TCA_GRED_PARMS] == NULL) | |
277 | return -1; | |
a5a6f1e8 | 278 | |
aba5acdf SH |
279 | qopt = RTA_DATA(tb[TCA_GRED_PARMS]); |
280 | if (RTA_PAYLOAD(tb[TCA_GRED_PARMS]) < sizeof(*qopt)*MAX_DPs) { | |
281 | fprintf(f,"\n GRED received message smaller than expected\n"); | |
282 | return -1; | |
283 | } | |
ae665a52 | 284 | |
aba5acdf SH |
285 | /* Bad hack! should really return a proper message as shown above*/ |
286 | ||
287 | for (i=0;i<MAX_DPs;i++, qopt++) { | |
288 | if (qopt->DP >= MAX_DPs) continue; | |
289 | fprintf(f, "\n DP:%d (prio %d) Average Queue %s Measured " | |
290 | "Queue %s ", | |
291 | qopt->DP, | |
292 | qopt->prio, | |
293 | sprint_size(qopt->qave, b4), | |
294 | sprint_size(qopt->backlog, b5)); | |
295 | fprintf(f, "\n\t Packet drops: %d (forced %d early %d) ", | |
296 | qopt->forced+qopt->early, | |
297 | qopt->forced, | |
298 | qopt->early); | |
299 | fprintf(f, "\n\t Packet totals: %u (bytes %u) ", | |
300 | qopt->packets, | |
301 | qopt->bytesin); | |
302 | if (show_details) | |
303 | fprintf(f, "\n limit %s min %s max %s ", | |
304 | sprint_size(qopt->limit, b1), | |
305 | sprint_size(qopt->qth_min, b2), | |
306 | sprint_size(qopt->qth_max, b3)); | |
307 | fprintf(f, "ewma %u Plog %u Scell_log %u", | |
308 | qopt->Wlog, qopt->Plog, qopt->Scell_log); | |
309 | } | |
310 | return 0; | |
311 | } | |
312 | ||
95812b56 | 313 | struct qdisc_util gred_qdisc_util = { |
f2f99e2e SH |
314 | .id = "gred", |
315 | .parse_qopt = gred_parse_opt, | |
316 | .print_qopt = gred_print_opt, | |
aba5acdf | 317 | }; |